 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.views.navigator;

 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.internal.views.navigator.ResourceNavigatorMessages;

 /**
  * Implementation of the view sorting actions.
  * @since 2.0
  */
 public class SortViewAction extends ResourceNavigatorAction {
     private int sortCriteria;

     /**
      * Creates the action.
      *
      * @param navigator the resource navigator
      * @param sortByType <code>true</code> for sort by type, <code>false</code> for sort by name
      */
     public SortViewAction(IResourceNavigator navigator, boolean sortByType) {
         super(
                 navigator,
                 sortByType ? ResourceNavigatorMessages.SortView_byType : ResourceNavigatorMessages.SortView_byName);
         if (sortByType) {
             setToolTipText(ResourceNavigatorMessages.SortView_toolTipByType);
         } else {
             setToolTipText(ResourceNavigatorMessages.SortView_toolTipByName);
         }
         setEnabled(true);
         sortCriteria = sortByType ? ResourceComparator.TYPE : ResourceComparator.NAME;
         PlatformUI.getWorkbench().getHelpSystem().setHelp(this,
                 INavigatorHelpContextIds.SORT_VIEW_ACTION);
     }

     public void run() {
         IResourceNavigator navigator = getNavigator();
         ResourceComparator comparator = navigator.getComparator();

         if (comparator == null) {
             navigator.setComparator(new ResourceComparator(sortCriteria));
         } else {
             comparator.setCriteria(sortCriteria);
             navigator.setComparator(comparator);
         }

     }
 }

